Seal for window sash



5- H. T. PEIRSON' SEAL'FOR WINDOW SA SHES Filed July 21, 1941 PatentedAug. 21, 1945 PATENT OFFICE a a 1 2,383,155 l i i 1 Q FOR- wmnow SASHHarold]; Peirson, Brooklyn. N. Y. Application Jilly 21, 194;, Serial No;403,388

This invention 'relates to a seal forhmetallic window sash torthe-purpose. oiwaterproofing andsealin-g the sashwhere it connects tothe masonry. of the wall and where it connectsto metallic mullions.

oi the sash whereit enters the; wallflor is used between a sash and themullion. The asphalt is waterproof and durable and in the form of afabricated-strip is easily appliedwAnother obiect of the invention isftoprovide a flexible, preformedstrip of asphalt which maybe applied in theform of a U-shap'e to the rib of the sash or may be applied in the formof an angle to the sill oi the sash. Another object of the invention isto provide. for waterproofing the bolt holes securing the sash to themullion from the strip ofqasphalt that separates theseparts. Otherobjects of the invention will appear from the following specificationand the accompanying drawing, in which: w

Fig. Lis a strip of fabricated asphalt'used in. carryinguout thisinvention; Fig. 2 is an end view of au-shapedeveloped from. strip I; l lFig. 3;,is an angular shape. developed from M Fig. 4 is a sectional viewof a header construction with the window sash in placei Fig. 5 is asectionalview of the side Tof the sash in the masonry; L

Fig.-6 is a sectional view oi the window sill; Fig. -7 isasectional'view of a pairof window sashes secured, to a mullion; Fig. 8.is a front roding or rusting of metallic or steel window sash where itis built into the masonry. The rust grows in scales arising from thedampness transmitted through the masonry; these scales build up layerupon layer and ultimately lead to a An object of the invention is to,provide a. waterproof seal in the, form of a strip oasphalt whichsurrounds the metallic part ams. (01. 189-75) To avoid these conditionsthe present invention provides a strip of asphalt around the rib oi thesash which enters the masonry. This strip is applied to the rib by awaterproof adhesive andiis of sufficient thickness to form a pad orcushion for the metal in the masonry that yields to any pressure thatmay arise from normal building, movement or settling. In addi- ,tion tothisthe asphalt forms a durable wateradjustable to the sizeof thesillmember without trimming.

.When the sash is supported bya metallic plate such as a metallicmullion, a strip of asphalt is inserted between the sash and the mullionto seal and waterproof this connection. lt is common practice to boltthe sash to the mullion and bolt holes are provided .for. thispurposeiThese bolt holes; however, are considerably larger than the bolts toprovide for adjustment ofthe window sash. It is necessary to. preventleakage. at the bolt holes so that moisture getting access to the metalat this place cannot spreadand'dev'elop rust,v and so that weather leakswill not occur around the bolts. This condition is effectively avoidedby applying a strip of asphalt. with an adhesive to the surface. offfthewindow sash or the surface ofthe mullion and opposite thebolt holes toslit it radially so that as the bolt is forced into the hole against theoffset asphalt strip the radial projections of the asphalt are carriedinto the holes. This effectively providesa coating of asphalt for thehole and as the bolt is tightened and the asphalt being somewhat viscousit distortion of the window sash or even to'fracture of the masonry.Other corrosions also occur which over a period of time affect theusefulness of the sash.

flows into the space between the bolt and the walls of the hole to makean eiiective seal which layers from adhering to each other in handling.1

Prior to this one side of the strip of asphalt may be coated with anadhesive as a rubber cement, and then rolled up for shipment to theplace of use. The strip is preferably applied to the metallic surfacewith a waterproof adhesive, but it can be made adhesive by theapplication of heat.

When the skin of the asphalt is broken as in the case where it is slitat the bolt holes, the interior asphalt of the strip which is releasedis adhesive and sticks .permanently to the metal. The adhesive holds thesurface of the strip to the iron while the soft interior flows underpressure into the hole and is free to fill the hole. The extent to whichthis result can be secured depends upon the thickness of the asphaltstrip and the space between the bolt and the walls of the hole: If thespace is too great, or the strip too thin, the hole will' not be filledwith the free flowing asphalt.

When the strip is applied with threaded bolts in holes which haveconsiderable clearance the threads act as a screw conveyorfordistributing the apshalt in the hole.

The fabricated strip of asphalt holds its shape and adheres to thesurface of the metal; it does not tend to run under ordinarytemperatures.

In the drawing the asphalt strip 31 is folded along the lines a and binto the U-shape, Fig. 2, with the legs 32 and 33 spaced at d. and theV-groove at 34 having the depth 0. This U- shape is applied as shown inFigs. 4 and 5 to the rib l2 of the sash H which supports the glass 14 bythe putty l5 on the sash. In Fig. 4 a groove is provided at 22 betweenthe angles 2| of the header which supports the masonry 20, and the ribl2 with the strip 3| is fitted into this space 22. In Fig. 5 the rib I2,with the protecting strip 3| is built directly into the masonry 20without a form or other preparation. It should be noted that thethickness of the asphalt strip provides for a Sliding motion of the sashrelative to the masonry,

and at the same time the depth of the groove at 34 provides for a largerelative movement in this direction.

In the sill construction in Fig. 6 the masonry base 23 tapers oil in aslope 24 to shed the Water and is built in an upstanding ridge againstwhich the angle l2a of the sill member of the sash l I is placed asshown with the strip 3| covering both faces of the angle. The strip3l'is the same strip as used in Figs. 4 and 5 but the leg 33 is bentaround as indicated by the arrow e in Fig. 2 to the angular constructionshown in Fig. 3 which fits the angle of the sash. In practice it isdesirable that the strip 3| cover the faces of the angle and does notproject beyond the angle. At the same time it is not convenient to trimthis material on the ground. The loop formed at the groove 34 isadjustable for this purpose so that it may be flattened out to increasethe length of the legs Or it may be made larger to take up the surplus.This is readily carried out by the workmen as the installation is beingmade and the sealing material fills up the corner.

In themullion construction, Fig. 7, the sash I2 is secured to the plate29 of the mullion 30 by the bolts 26. The face of the. sash adjacent toplate 29 has applied thereon by an adhesive the asphalt strip 25 whichforms a seal and cushion for this connection. The sash and the mullionhave apertures therein for the bolts 26 and, after the strip 25, Fig, 8,is secured to the sash over the holes2l, radial slits as indicated at28, are

made in the asphalt directly over the holes 21. The bolt is then appliedas indicated in Fig. 9 in which the entering end of the bolt forces theradial portions of the fabric into the hole 21 as indicated at 4|. 7.The bolt is fully threaded and when it is tightened to compress thestrip 25 the asphalt flows into the holes in the space around thebo'ltas indicated at 40, thereby making a complete waterproof seal atthis point. In this operation, the threads of the bolt which are looseinthe'holes of the plates, also act as a screw conveyor to distributethe asphalt. The fabric 32 is coated on both sides with asphalt 25, andthis fabric also is engaged by the threads of the screw and tends tofollow the screw in the hole.

The skin of the strip is held in place on the iron by the adhesive whilethe pressure of the screw clamp forces the asphalt from a. considerablearea into the space in the hole; The space that may be filled is limitedby the amount of free flowing asphalt that can be forced from the strip.

Having thus described my invention, I claim:

1; In combination with a metallic window frame having a sill member ofsubstantially right angle cross section, and a sill to receive the sillmember, of means for sealing the joint between the sill member and sillagainst corrosion and infiltrations, said means comprising a strip ofasphalt affixed to both undersurfaces of the sill member by an adhesive,the asphalt strip having a V formed adjacent the center thereof wherebythe same is adjustable to different sizes of sill members. I

2. A protection for the projecting ib of a metallic window sash againstcorrosion and infiltrations comprising a pre-formed, substantially U-shaped asphalt. cover for said rib having one leg thereof longer thanthe other leg, and having an inwardly extending groove at thebend of theU- shape.

HAROLD T. PEIRSON.

